package com.atguigu.springcloud.lb;

import org.springframework.cloud.client.ServiceInstance;
import org.springframework.stereotype.Component;

import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;

@Component
public class MyLB implements LoadBalance{
    private AtomicInteger atomicInteger=new AtomicInteger(0);
    public final int getAndIncrement(){
        int current;
        int next;
        do {
            current=this.atomicInteger.get();
            next=current>=2147483647 ? 0:current+1;
        }while (this.atomicInteger.compareAndSet(current,next));
        System.out.println("第几次访问*****next"+next);
        return next;
    }
    @Override
    public ServiceInstance instances(List<ServiceInstance> serviceInstanceList) {
        int index = getAndIncrement() % serviceInstanceList.size();

        return serviceInstanceList.get(index);
    }
}
